Answer:
The normal role of this control element can be that of a negative modulator or regulator
Explanation:
For example, the lactose operon in the bacteria <em>Escherichia coli</em> is negatively regulated. In lactose absence a represor protein is produced, which inserts in the DNA operator site blocking transcription of structural genes. if for example a mutation affects the synthesis of this repressor, expression of structural genes will increase with no regulation.
A mutation in the DNA operator site that avoids insertion of the repressor, too.
A mutation in the gene that codes for the repressor, will also do the job
Answer:
Day-to-day changes in weather can influence how we feel and the way we look at ... Meteorology is the science of forecasting weather.
Answer:
A sperm cell
Explanation:
A diploid cell has 46 chromosomes which is normally signified by somatic cells. Germ cells or gametes are haploid cells therefore they contain only 23 chromosomes. Male gamete contains 22 autosomes and one sex chromosome. That sex chromosome can be X or Y.
Female gamete does not have Y chromosome as a sex chromosome, it has only X chromosome as a sex chromosome. So Y chromosome in a human cell which have 22 autosomes determines that it is a male gametic cell or a sperm cell. Sperm cells that have a Y chromosome if fuses with female gamete produce male offspring(XY).
So the correct answer is- a sperm cell.
A meteorologist would use a radar to follow the path of an approaching thunderstorms
I hope this helps!
